Friction-clutch



(No Model.) 2 SheetsSheet 1. W. H. MGGONNELL.

FRICTION GLUTGH.

Patented May 20, 1890.

I l/E/VTOR:

By ay/WW A TTORNE Y 8.

(No Model.) 2 Sheets-Sheet 2.

W. H. MGGONNELL. FRICTION-CLUTCH.

No. 428,568. Patented May 20, 1890.

ATTORNEYS.

PATENT FFICEQ TVILLIAM H. MCCONNELL,

FRICTION- OF NELSONVILLE, OHIO.

CLUTCH.

SPECIFICATION forming part of Letters Patent No. 428,568, dated May 20,1890.

Application filed September 10, 1889.

To all whom it may concern.-

Be it known that I, WVILLIAM H. MOOON- NELL, of Nelsonville, in thecounty of Athens and State of Ohio, have invented a new and ImprovedFriction-Clutch, of which the following is a full, clear, and exactdescription. The object of the inventionis to provide a new and improvedfriction-clutch which is simple and durable in construction, veryeffective in operation, and easilyadapted to all classes of hoisting andother machines.

The invention consists in certain parts and details and combinations ofthe same, as will be described hereinafter, and then pointed out in theclaims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is an end elevation of the improvement. Fig. 2 is a sectionalside elevation of the same on the line 00 00 of Fig. 1. Fig. 3 is asectional end elevation of the same on the lineyg of Fig. 2. Fig. 4 is aperspective view of the block or cross-head. Fig. 5 is a sectional planview of part of the improvement on' the linezzof Fig. 3. Fig. 6 is aperspective View of one of the shifting-forks; and Fig. 7 is an enlargedside elevation, with parts in section, of one of the toggle-arms.

On the shaft A is mounted loosely the drum B, connected with thehoisting-machine and adapted to be rotated with the shaft A by thefriction-clutch presently to be described. On the shaft A is secured apulley O, on one face of which are pivoted at D and D the segmental armsD and D, respectively, adapted to engage with their rims the inside ofan annular rim B, formed on one face ofthe drum B. Each segmental arm Dor D is preferably made of metal, having its periphery covered withwood, so as to increase the friction of the contacting surfaces. Thefree ends of the segment-a1 arms D and D are provided with lugs Dpivotally connected by the toggle-arms E and E, respectively, with ablock or cross-head F, mounted to slide radially in suitable guideways0, formed 011 the pulley O.

The block or cross-head F is pivotally connected by a link G with asleeve H, mounted to turn loosely on the shaft A, and adapted to SerialNo. 323,508. (No model.)

slide forward and backward on the same by a shifting mechanism,preferably of the construction shown in the drawings, in which the saidmechanism is provided with two segmental arms I, engaging an annulargroove H on the sleeve H. A pin 1 projects from each of the segmentalarms I and fits into an elongated slot formed in a crank-arm J, securedon a shaft K, mounted to turn in suitable bearings formed in thestandard L, which latter also forms part of the bearing for the maindriving-shaft A.

On the shaft K is held a handle N, serving to conveniently turn theshaft K, so as to move the sleeve H inward or outward to throw thesegmental arms D or D in or out of contact with the annular flange B onthe drum B.

Each of the toggle-arms E isadapted to be lengthened or shortened, beingprovided for this purpose with the threaded rods E screwing in the nutsE as is plainly shown in Fig.

7. The outer ends of the rods E are formed with eyes for the receptionof the pivots which connect the respective segmental arm D or D and theblock F with the said toggle-arm. By turning the nuts E the two rods Eare moved toward or from each other, according to the direction in whichthe nut is turned, so that each toggle-arm can be lengthened orshortened at pleasure to set the segmental arm D or D in the properposition in relation to the annular flange B.

The operation is as follows: When the shaft A is rotated and the sleeveH is in an outermost position, the segmental arms D and D are out ofcontact with the annular flange B on the drum B, as shown in Fig. 3.Vthen the operator throws the handle N into the position shown in Figs.1 and 2, the movement of the handle N turns the lever K, so that thearms J move the sleeve H inward, whereby the link G is moved outwardinto a vertical position, moving the block or cross-head F radiallyoutward in its guideways O on the pulley O. The outward radial movementof the block or cross-head F moves the toggle-arms E and'E' outward, sothat they press against the free ends of the segmental arms D and Duntil the latter are forced at their peripheries into contact with theinside of the annular flange B of the drum B. As the rotary motion ofthe shaft A rotates the pulley O and the latter carries the saidsegmental arms D and D, the drum B is rotated with the said pulley C andthe shaft A as soon as the said segmental arms D and D are thrown infrictional contact with the flange B of the drum B. \Vhen the drum Bisengaged, the togglearms E and E stand at right angles to the link G andthe block F, so that the several parts are locked in place and remain inthis position until the operator moves the handle N outward from thedrum B, so as to move the sleeve H in the same direction, whereby thelink G pulls the block or cross-head inward until the toggle-arms E andE assume an inclined position toward each other and draw the segmentalarms D and D out of 0011- tact with the annular flange 13 of the drum B.The rotary motion of the latter then ceases, while the pulley C and theparts carried by the same still rotate with the main shaft A.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A friction-clutchcomprising two segmental arms pivoted at one end ofthe drivingpulley, togglearms connected with the free ends of the saidsegmental arms, and a block or cross-head mounted to slide radially onthe driving-pulley and connected with the said toggle-arms,substantially as shown and described.

2. The combination of the shaft, the pulley thereon having radial ways,the two segmental arms pivoted at one end to the pulley, theradially-sliding cross-head mounted on said ways, and toggle-armsconnecting the free ends of the segmental arms with said crosshead, witha sleeve on the shaft movable toward and from the pulley, and a linkconnecting the cross-head and sleeve, substantially as set forth.

3. The combination, with the shaft A and the loosely-mounted drum B,having an annular rim B, of the pulley O, fixedly secured to the shaftand provided with radial ways 0, the segmental arms D D, pivoted to thepulley at D D the cross-head F, sliding in said ways, the toggle-armsconnecting the free ends of said segmental arms with the cross-head, thecollar H on the shaft, the link G, connecting the collar and cross-head,the rock-shaft K at right angles to the shaftA and provided with arms J,extending to opposite sides of the collar, connections between saidcollar and arms, and the lever N, substantially as set forth.

\VILLIAM II. MCCONNELL. lVitnesses:

EUGENE J. CABLE, WESLEY O. IIIcKMAN.

